Micragnostus
Encyclopedia
Micragnostus is a genus of trilobite
in the order Agnostida
, which existed in what is now north Wales
. It was described by Howell in 1935, and the type species is Micragnostus calvus, which was originally described as a species of Agnostus
by Lake in 1906.
Trilobite
Trilobites are a well-known fossil group of extinct marine arthropods that form the class Trilobita. The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period , and they flourished throughout the lower Paleozoic era before...
in the order Agnostida
Agnostida
Agnostida is an order of arthropod which first developed near the end of the Early Cambrian period and thrived during the Middle Cambrian. They are present in the lower Cambrian fossil record along with trilobites from the Redlichiida, Corynexochida, and Ptychopariida orders...
, which existed in what is now north Wales
Wales
Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...
. It was described by Howell in 1935, and the type species is Micragnostus calvus, which was originally described as a species of Agnostus
Agnostus
Agnostus is a genus of trilobites that lived approximately 540 to 438 million years ago. The agnostids were small , with two thoracic segments and a large tail....
by Lake in 1906.